Unregister with push service and SW database when permission is lost.

chrome/browser/services/gcm/push_messaging_application_id.h

Index: chrome/browser/services/gcm/push_messaging_application_id.h
diff --git a/chrome/browser/services/gcm/push_messaging_application_id.h b/chrome/browser/services/gcm/push_messaging_application_id.h
index 54f14807f2ce9650a0f4785128a9157ca985584e..e4137a68c3b0bef952dbe4a38b4b47efce6d3aa8 100644
--- a/chrome/browser/services/gcm/push_messaging_application_id.h
+++ b/chrome/browser/services/gcm/push_messaging_application_id.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_SERVICES_GCM_PUSH_MESSAGING_APPLICATION_ID_H_
 
 #include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "url/gurl.h"
@@ -44,6 +45,10 @@ class PushMessagingApplicationId {
                                         const GURL& origin,
                                         int64 service_worker_registration_id);
 
+  // Returns all the PushMessagingApplicationId currently registered for the
+  // given |profile|.
+  static std::vector<PushMessagingApplicationId> GetAll(Profile* profile);
+
   ~PushMessagingApplicationId();
 
   // Persist this application id to disk.